Introduction
This set comprises 50 MCQs focusing on John Dalton's life, his atomic theory, postulates, and limitations. The questions also cover the laws of chemical combination, symbols of elements, and the concept of atomic mass. These questions are designed to test both factual knowledge and conceptual clarity essential for board examinations.
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📘 SCIENCE
CHEMISTRY | Atoms & Molecules-B
📝 Questions: 50
⏱️ Timer: 20 min
Q1. John Dalton was born in:
Q2. John Dalton was born in a family of:
Q3. John Dalton began his career as a teacher at the age of:
Q4. After how many years did Dalton become a school principal?
Q5. Dalton moved to Manchester in:
Q6. In Manchester, Dalton taught:
Q7. Dalton presented his atomic theory in:
Q8. Dalton's atomic theory was a turning point in the study of:
Q9. According to Dalton, matter is made up of:
Q10. Atoms participate in:
Q11. Atoms are considered indivisible in:
Q12. Which cannot be created or destroyed in a chemical reaction?
Q13. Atoms of the same element are identical in:
Q14. Atoms of different elements differ in:
Q15. Atoms combine to form compounds in the ratio of:
Q16. In a given compound, the relative number of atoms is:
Q17. The law of conservation of mass states that mass is:
Q18. Hydrogen and oxygen combine by mass in the ratio:
Q19. The compound formed by hydrogen and oxygen is:
Q20. The law of definite proportions states that compounds have:
Q21. The building blocks of all matter are:
Q22. Atomic radius is measured in:
Q23. One nanometre (nm) equals:
Q24. The size of an atom is approximately:
Q25. A grain of sand has a size of approximately:
Q26. Dalton was the first scientist to use symbols for:
Q27. Dalton's symbols represented:
Q28. Berzelius suggested symbols using:
Q29. The first letter of a chemical symbol is always:
Q30. The second letter of a chemical symbol is written as:
Q31. Which is the correct symbol for aluminium?
Q32. The symbol Co stands for:
Q33. The symbol of iron is derived from the Latin word:
Q34. The symbol Na comes from the word:
Q35. The symbol K for potassium comes from:
Q36. The organisation that approves element names and symbols is:
Q37. Atomic mass is characteristic of:
Q38. Atomic mass unit is now represented by:
Q39. Carbon monoxide is represented by the formula:
Q40. In CO, carbon combines with oxygen in the mass ratio:
Q41. Relative atomic masses were determined using:
Q42. Determining the mass of an individual atom is:
Q43. The smallest building block of matter is:
Q44. Which of the following is larger than an atom?
Q45. An ant has a size of approximately:
Q46. An apple has a size of approximately:
Q47. Atoms affect our lives because:
Q48. Modern techniques allow us to see:
Q49. Which of the following is the correct symbol for chlorine?
Q50. The symbol for copper is:
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